Improvement in millstone supporting and driving devices



i 3 Sheets-Sheet L 0. J. BOLLINGER.

Millstone Supporting and Driving Devices.

No. 221,906. Patented Nov'.25, I879.

- 3 Sheets-Sheet 2. 0. J.BVOLLINGE-R i Millstone Supporting and- DrivingDevices. a N0. 221,906. Patented Nov. 25, 187-9.

' v 3 Sheets-Shet 3, v 0. J. BOLLINGER; v

Millstone Supporting and Driving Devices. No. 22l,906.' PatentedNov.'25,.l87 9.

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FFI'GE,

OLIVER J. BOLLJNGER, OF YORK, PENNSYLVANIA.

IMPROVEMENT IN MILLSTONE SUPPORTING AND DRIVING DEVICES.

Specification forming part of Letters Patent No. 221,906, dated November25, 1879; application filed February 20, 1879.

To all whom it may concern Be it known that I, OLIVER J. BOLLINGER, ofYork, York county, Pennsylvania, have invented Improvements in Devicesfor Support ng and Driving Millstones, of which the following is thespecification.

My invention relates to devices for hanging, supporting, and driving amillstone, constructed as fully described hereinafter, to secure hardand durable bearings, reduce friction, prevent unequal wear andbacklash, and permit nice and easy adjustment.

In the drawings, forming part of this specification, Figure 1 is asectional elevation illustrating my invention; Fig. 2, a sectional planoil the line 1 2, Fig. 1; Fig. 3, a section of the shaft, end piece, anddriver; Fig. 4, a detached view of part of the step'; Fig. 5, a sectionshowing a modification; and Fig. 6, a plan, in part section, of Fig. 5.

A is the spindle; B, the step; F G, the driver; and H the cone-bail. Thestep consists of a base-plate, N, secured by a central bolt, U, andhaving a tongue, at, at one side. A central cylindrical case, 0, restsupon this base, and is secured thereto by a bolt, I), ex-

tending through a slot, 0, in a lateral tongue, (1, into the tongue atof the base-plate, and on the sideof the case 0, opposite the tongue a,is a standard, f.

The slot 0 permits the case Oto be adjusted slightly in any directionhorizontally, and setscrews m, extending through the lugs 12 on thebase-plate, secure the case after adjustment.

A lever, B, bearing on the standard f, is formed near the end into ayoke, R, inclosin g the case 0, and is supported at the outer end by anadjusting-bolt, S.

The sides of the case 0 have slots g to receive lugs rat the inside ofthe yoke R, the said lugs having bearin gs for knife-edge projections pon an oil-box, P, thus suspended within the case 0.

An annular rib, 8, central with the edges of the projections 19, has arounded outer face to permit the tilting of the oil-box in the case 0,without any lateral play of the lugs 19 upon their bearings.

The oil-box has a recess at its lower end to receive a rectangularblock, V, of hard metal,

roundedor pyramidal at its under side, and flat on its upper face, uponwhich bears the flat lower end of the shaft, the latter passing througha liner or sleeve, Q, resting with its lower end on the corners of theblock V, as shown in dotted lines in Fig. 2. Ribs 11, extendingvertically outside of the block Q, coincide with ribs to inside the boxP, leaving intermediate channels a", which communicate with the space Wbelow the liner, and constitute, with said space, the oil-receptacle.

A screw-bolt, T, extending into an opening, 71, Fig.2, partly in theliner and partly in the oil-box, prevents the liner from turning.

The bottom end of the shaft A is hardened in any suitable manner, andhaving a flat bearat more than one point, and without interfering withthe rotation of the plate to adjust the same. It also secures the platefirmly after adjustment.

By turning the plate N on the bolt U the lever It can be brought at anydesired angle, horizontally, to the bridge-tree, and by moving the case0 on the plate the shaft may be brought exactly to its verticalposition, and, with the stone, may be elevated or lowered by adjustingthe lever It, while the oil-box will swing upon its hearings toaccommodate itself to any imperfection or maladjustment, thus avoidingall unequal wear of the liner, which, when worn, may readily be removedand replaced.

left, through which the oil may reach all the bearing parts, and allgrit and sediment may pass from said parts to the chamber W to beafterward removed.

To avoid the heavy work necessary to forge the upper end of the shaft Ato the proper shape, I employ a cast-metal end piece, D, terminating ina projection or cock-head, G, and

As the liner rests only on the corners of the block V, spaces i, Fig. 1,are

may be hardened or chilled in casting, so as v to secure the greatestpossible durability and avoid the expense of the lathe-fittin g usuallyrequired.

The driver consists of a hub, G, through which extends the projection O,and from the ends of which arise two horns, F F, which extend intorecesses b in the cross-bar J, the hub having recesses o, to receiveribs 0 on the projection O, which ribs terminate in knife-edges on whichthe hub Gr bears, so that the driver may rock thereon slightly and thusalign itself with the cross-bar J, insuring an equal bearing of thehornsatall times, the ribs a further strengthening the cock-head.

The bearin gs of the driver-horns F F, in the mortises of the crossbarJ, are on a plane or line with the point a of the spindle, so that incase the spindle should be out of tram (as it is usually termed,) nolateral strain is thrown on the point a, as would be the case were thesepoints out of line with each other as in the common bail and driver.

The cone-bail H is secured to the stone in the usual manner, and thegrain is fed either through the same, as shown in Fig. or outside thesame, as shown in Figs. 5 and 6. I prefer the latter construction, asgum segments F may then be introduced in this form of constructionbetween the horns and crossbar J, serving as lateral bearings for thehorns and preventing the shocks or jars resulting from irregular motionof the engine.

I do not here claim the construction shown in Figs. 5 and 6, as the samemay form the subject for another application for Letters Patcut; but

I claim 1. The combination of the plate N, the case 0, pivoted theretoat b, and adjustable thereon, and the oscillating oil-box P, supportedby a lever, B, carried by the case and receiving the end of the shaft,substantially as set forth.

2. The plate N, carrying the oil-box bearing and lever B, and capable ofrotation on the central bolt, U, securing the plate to the base,substantially as described.

3. The combination, with the case 0, of the yoked lever R, havingbearings for lugs upon an oil-box provided Witha rounded edged rib,

vs, on a plane with the edges of the lugs, substantially as and for thepurpose set forth.

4. The combination, with the flat ended shaft A, of a bearing-block, 'V,resting on a fiat surface and having a flat upper face, and rounded uponits under face, as set forth.

5. The combination, with the oil-box 'P and block V, of the liner Q,bearing on the corners of the block, substantially as specified.

6. A millshaft consisting of a plain cylindrical bar of wrought metaland a cast-metal end piece, provided with suitable shoulders and bearingfaces and terminating in a hardened point, as set forth.

7. The combination of the cone-bail H, cross-bar J, and driver providedwith upwardly-extending horns bearing laterally on the cross-bar atpoints opposite the bearin g of the bar upon the spindle, as set forth;

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

OLIVER J. BOLLINGER.

Witnesses:

F. T. Scorr, DAVID IRNEsT.

